Air blower



March 20, 1945. A. J. HAVlS 2,371,821

. AIR BLOWER Filed June 2, 1943 2 Shee'ts-Sheet 1 N In uentor rarbJl/ww's Q 2mm March 20, 1945. A. J. HAVIS 2,371,821

AIR BLOWER Filed June 2, 1943 2 Sheets-Sheet 2 Inventor Aaron J. Haws erally referred to by numeral l5.

Patented Mar. 20, 1945 UNITED STATES PATENT OFFICE AIR BLOWER Aaron J. Havis, Portsmouth, Va. Application June 2, 1943, Serial No. 489,421

1 Claim. (01. 290-114) This invention relates to new and useful innprovements in air blowers of the high pressure developing typ the principal object of the invention being to provide a multi-stage centrifugal type of high pressure air blower which will be especially adapted for use in super-charging engines where a large volume of air under high pressure is required.

An important object of the present invention is to provide an air blower of the character described which has a minimum number of parts that are subjected to wear and consequential defectiveness.

Other objects and advantages of the invention will become apparent to the reader of the following description.

In the drawings:

Figure 1 represents a longitudinal sectional view through the blower.

Figure 2 is a cross-section on line 2-2 of Figure 1.

Figure 3 is a cross-section on line 3-3 of Figure 1.

Referring to the drawings wherein like numerals designate like parts, it/ can be seen that numeral 5 denotes an elongated frusto-conical shell, open at each end and having supporting spiders 6, 8 within its large and small end portions, the spider 6 having brace members 8 and supporting a bearing Ill, while the spider 8 supports a bearing II.

An elongated shaft I2 is journaied through the bearings ill, I I and has a coupling plate It at one end thereof.

The operating mechanism of the blower consists in the provision of a plurality of stationary blade assemblies generally referred to by numeral l4 and a plurality of rotary blade assemblies gen- These blade assemblies decrease in size from the large end of the shell 5 toward the small end thereof.

Each stationary blade assembly It consists of a plurality of radially disposed and transversely angularly set blade elements It, each welded or otherwis secured to a band H which is in turn bolted or otherwise secured as at It inside of the shell 6. The inner ends of the blades it are welded or otherwise secured to a collar II which has an internal bearing 20 and through this the aforementioned shaft 12 is journaled.

The rotary blade assemblies M are each made up of a clamp 2 I, the clamp being divided into a number of sections such as sections a, b, and 0. these sections having their ends flanged as at d. In conjunction with these sections, blades 22 are provided and each has a threaded shank 23 which is disposed through corresponding threaded openings in the flanges d of the clamp 2 I. When the blades 22 have been set at the proper transverse inclination as suggested in Figure 2, the blades are held in place by jamb nuts 24 which are set snugly against the adjacent flanges of the sections a, b and c.

Obviously, the blades 22, in cooperation with the stationary blade It, will serve to develop a high pressure when the shaft i2 is rotated rapidly, this in conjunction with the tapering construction of the shell 5.

It is obvious that air enters the large end of the shell and inasmuch as each stage of blades decreases in area the air taken in, the air is put under pressure so that by the time it reaches the outlet or small end of the shell is moving under a high pressure.

Further, the blades may be of any size or shape and properly pitched to perform their most eiilcient work and to acquire the amount of pressure desired.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size, and materials may be resorted to without departing from th spirit and scope of the invention as claimed hereinafter.

Having described the invention, what is claimed as new is:

In an air blower of the character described, a rotary shaft, and a rotary blade assembly secured on said shaft, said assembly including a clamp composed of a plurality of sections having mating flanged ends provided with threaded openings, blades having axial threaded shanks on the inner ends thereof screwed into the openings 01 the mating ends of the flanged sections to secure the latter together and to permit angular adjustment of the blades about their longitudinal axes, and jamb nuts threaded on said shanks for securing the blades in adjusted position.

AARON J. HAVIS. 

